This scatter plot displays car data from the UCI Machine Learning Repository’s Auto MPG dataset, with dropdown menus letting users select which columns map to the X and Y axes. The visualization uses D3 v5 to render SVG circles with animated transitions, scaling axes via `scaleLinear` and updating axes with `axisBottom` and `axisLeft`. The menus are built using a reusable `dropdownMenu` function, while the plot itself updates smoothly thanks to `transition().duration(1000)` on circle positions.